<template>
  <div class="login-container">
      <!--导航栏-->
      <van-nav-bar class="login-nav-bar" title="登录"><van-icon slot="left" name="arrow-left" @click="$router.back()" /></van-nav-bar>
      <!--表单-->
      <div class="login-wrapper">
          <h3>短信登录</h3>
          <van-form ref="loginForm" @submit="onSubmit">
              <van-field
                v-model="user.mobile"
                name="mobile"
                placeholder="请输入手机号"
                :rules="userFormRules.mobile"
                type="number"
                maxlength="11"
               >
                 <i slot="left-icon" class="toutiao toutiao-shouji"></i>
               </van-field>
               <van-field
                v-model="user.code"
                name="code"
                placeholder="请输入验证码"
                :rules="userFormRules.code"
                type="number"
                maxlength="6"
               >
                 <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
                 <template #button>
                   <!-- time: 倒计时时间 -->
                   <van-count-down v-if="isCountDownShow" :time="1000 * 10" format="ss s" @finish="isCountDownShow = false"></van-count-down>
                   <van-button v-else class="send-sms-btn" round size="small" type="defauit" @click="onSendSms">发送验证码</van-button>
                 </template>
               </van-field>
               <div style="margin: 16px;">
                 <van-button block type="info" native-type="submit">提交</van-button>
               </div>
          </van-form>
      </div>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'

export default {
  name: 'Login',
  components: {},
  data () {
    return {
      user: {
        mobile: '', // 手机号
        code: '' // 验证码
      },
      userFormRules: {
        mobile: [{
          required: true,
          message: '手机号不能为空'
        }, {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true,
          message: '验证码不能为空'
        }, {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }]
      },
      isCountDownShow: false // 是否展示倒计时
    }
  },
  methods: {
    async onSubmit () {
      // 1.获取表单数据
      const user = this.user
      // 2.表单验证

      // 在组件中必须通过 this.$toast 来调用 Toast 组件
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 默认显示是2秒 设置0是持续显示
      })

      // 3.提交表单请求登录
      try {
        const { data } = await login(this.user)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功')
        const res = await login(user)
        console.log('登录成功', res)
        // 登录成功，跳转回原来的页面 back方式不严谨
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
          // console.log('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败请稍后重试')
          // console.log('登录失败请稍后重试', err)
        }
      }
      // 4.根据请求响应结果处理后续操作
    },
    async onSendSms () {
      console.log('onSendSms')
      // 1.校验手机号
      try {
        await this.$refs.loginForm.validate('moblie')
        console.log('验证通过')
      } catch (err) {
        console.log('验证失败', err)
      }
      // 2.验证通过，显示倒计时
      this.isCountDownShow = true
      // 3.请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败，关闭倒计时
        this.isCountDownShow = false
        if (err.response.status === 429) {
          console.log('发送太频繁，请稍后重试')
        } else {
          console.log('发送失败，请稍后重试')
        }
        // console.log('发送失败', err)
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container{
  width: 100%;
  height: 100vh;
  background-color: #fff;
}
.login-wrapper{
  padding: 0 .85333rem;
    h3{
       font-size: .64rem;
       font-weight: 400;
       margin: .8rem 0;
    }
}
.toutiao-yanzhengma{
  margin-top: 5px;
  display: inline-block;
}
</style>
